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新型冠状病毒蔓延全球之际，有科学家在巴西的人造湖（Lake Pampulha）中发现一种从未看过的病毒，目前已将它暂时命名为“雅拉病毒”（Yaravirus brasiliensis）。让科学家震惊的是，在目前所知的基因排序组合中，几乎没有可与其配对识别的，等于发现一个全新的病毒种类。

根据《Science Alert》报导，雅拉病毒在巴西被发现，由约80奈米大小的颗粒所组成。

研究人员指出，雅拉病毒带有大量过去未曾发现的基因，并非用复杂的基因组呈现，但近几年科学家发现病毒变异，而变异形式也让大家开始思考病毒如何传播或作用为何。

目前现有的8500个病毒基因组中，研究人员只找到6个“勉强”跟雅拉病毒有关联的基因，其余90%都是从未出现过的，因此被认为是“孤儿基因”，然而研究人员同时也担心，发现新种类病毒意味著开启新世界大门，恐怕病毒已存有巨大变异性。

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